Should work for low frequencies, however pay attention to the low frequency extension specification. On some cheaper stuff, I've seen not so great LF extension for some reason. Latency could also be an issue, so see if they spec that, although at low frequencies you would need a lot of latency to make a significant phase difference.
RF band: 2.4GHz Operating Frequency Range: 10 Hz - 20kHz
Wireless Range Up To: 70ft (130ft w/Line of Sight)
Included in System: OAW4-Tx (transmitter), OAW4-Rx (receiver), 2x USB AC Power Adapters, 2x 1/8" Stereo - Stereo RCA Cables, 2x Stereo RCA Cables, 2x USB to Micro - USB Cables, 2x Antennas, 1 Folded OAW4 Owner's Manual
Dimensions (H/W/D): 3.875" (w/ Antenna) x 3.75" x 4"
Weight (ea): 3.5oz.
Warranty: 2 years (parts/labor)
The version 4 is all that’s available from Outlaw with a transmitter and receiver at the moment. There are other similar systems on Amazon and such. Many are less expensive. I just don’t have any experience with them.